Well here I thought I was original, I use shock cord with small plastic hooks on my tarp doors. Clip them together to make a hex tarp or sometimes I clip the door to the oposite side tarp corner so I don't have to take extra stakes. If I need more room or want to open it up a little I can carve a quick stake and pull the doors outward a little. One time I used a little extra shock cord and hooked the doors around the foot end tree.
Beware of the man who owns one gun, he probably shoots it well.